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Royal Purple's proprietary additive technologies, such as Synerlec, enable its products to outperform leading synthetic and conventional lubricants
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Coupling Grease


Royal Purple's Coupling Grease is a lithium complex, high film strength grease that provides superior resistance to oil separation from the high centrifugal forces generated by couplings. It is formulated with high viscosity synthetic oils and tacky, synthetic polomers, plus Royal Purple's proprietary Synslide® additive technology to provide the tenacity and film strength necessary to protect against heavy loads and high centrifugal forces.

Find out more: See the PS & MSDS (Product Sheets and Material Safety Data Sheets)

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Hot Rod magazine Endorses Royal Purple® Lubricants
"It occurred to us that we've yet to run a test with Royal Purple® oil that didn't result in a power gain—it might be a marginal gain (as with our little Acura Integra), but it's a gain.
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